Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 12 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/25/2016   10:25:03   (  -0.06,-134.98) (   0.02,-135.31)   37.51                80
 12/26/2016   10:08:57   (  -0.05,-134.95) (  -0.96,-130.77)  475.38                80
 12/27/2016   22:28:14   (   0.06,-134.87) (  -0.19,-136.08)  137.54                80
 12/28/2016   22:12:08   (   0.05,-134.83) (   0.80,-131.54)  375.02                80
 12/30/2016   10:31:15   (  -0.06,-134.79) (   0.40,-136.81)  230.33                80
 12/31/2016   10:15:10   (  -0.05,-134.75) (  -0.58,-132.27)  281.70                80
 01/01/2017   22:34:25   (   0.06,-134.66) (  -0.62,-137.57)  332.57                80
 01/02/2017   22:18:21   (   0.06,-134.61) (   0.43,-133.05)  179.16                80
 01/04/2017   10:37:28   (  -0.07,-134.56) (   0.77,-138.31)  427.18                80
 01/05/2017   10:21:23   (  -0.06,-134.51) (  -0.22,-133.77)   84.09                80